<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">基因脸谱知识库</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" size="large" auto-complete="off" placeholder="账号">
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="密码"
          show-password
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.code"
          size="large"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img" />
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" class="mb-[25px]">记住密码</el-checkbox>
      <el-form-item style="width: 100%">
        <el-button :loading="loading" size="large" type="primary" style="width: 100%" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right" v-if="register">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
      <el-form-item class="text-blue-500 no-underline ml-6l">
        <router-link to="/login">
          <span>普通用户登录</span>
        </router-link>
      </el-form-item>
    </el-form>
  </div>
</template>

<script setup>
  import { getCodeImg } from '@/api/login';
  import Cookies from 'js-cookie';
  import { encrypt, decrypt } from '@/utils/jsencrypt';
  import useUserStore from '@/store/modules/user';
  import { getCurrentInstance, ref } from 'vue';
  import { useRouter } from 'vue-router';

  const userStore = useUserStore();
  const router = useRouter();
  const { proxy } = getCurrentInstance();

  const loginForm = ref({
    username: 'admin',
    password: 'admin123',
    rememberMe: false,
    code: '',
    uuid: '',
  });

  const loginRules = {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
  };

  const codeUrl = ref('');
  const loading = ref(false);
  // 验证码开关
  const captchaEnabled = ref(true);
  // 注册开关
  const register = ref(false);
  const redirect = ref(undefined);

  function handleLogin() {
    proxy.$refs['loginRef'].validate((valid) => {
      if (valid) {
        loading.value = true;
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set('username', loginForm.value.username, { expires: 30 });
          Cookies.set('password', encrypt(loginForm.value.password), { expires: 30 });
          Cookies.set('rememberMe', loginForm.value.rememberMe, { expires: 30 });
        } else {
          // 否则移除
          Cookies.remove('username');
          Cookies.remove('password');
          Cookies.remove('rememberMe');
        }
        // 调用action的登录方法
        userStore
          .adminLogin(loginForm.value)
          .then(() => {
            router.push({ path: redirect.value || '/' });
          })
          .catch(() => {
            loading.value = false;
            // 重新获取验证码
            if (captchaEnabled.value) {
              getCode();
            }
          });
      }
    });
  }

  function getCode() {
    getCodeImg().then((res) => {
      captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
      if (captchaEnabled.value) {
        codeUrl.value = 'data:image/gif;base64,' + res.img;
        loginForm.value.uuid = res.uuid;
      }
    });
  }

  function getCookie() {
    const username = Cookies.get('username');
    const password = Cookies.get('password');
    const rememberMe = Cookies.get('rememberMe');
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password: password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
    };
  }

  getCode();
  getCookie();
</script>

<style lang="scss">
  @import './public.scss';
</style>
